2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48303We consider constraints on gauge mediated supersymmetry breaking models imposed by the requirement of grand unification. In particular, we demonstrate several ways to reduce the number of parameters coming from the dynamical supersymmetry breaking sector. One of approaches exploits nonperturbative unification of gauge couplings in multi-messenger models.9 pages; Talk presented by S.T. at the 10th International Seminar ``Quarks-98'', Suzdal, Russia, May 18-24, 1998; to appear in the ProceedingsHigh Energy Physics - Phenomenologytext